Wastewater — Process Challenge

pH Adjustment for Wastewater Discharge Compliance

Effluent pH must be neutralized into the permitted discharge band (typically ~6-9) regardless of whether the stream arrives acidic or alkaline. Design stocks strong mineral acids and alkalis for two-sided pH trim
Why It Matters
Effluent pH must be neutralized into the permitted discharge band (typically ~6-9) regardless of whether the stream arrives acidic or alkaline. Design stocks strong mineral acids and alkalis for two-sided pH trim
Solution Approach

Effluent pH must be neutralized into the permitted discharge band (typically ~6-9) regardless of whether the stream arrives acidic or alkaline. Design stocks strong mineral acids and alkalis for two-sided pH trim RawSource supplies the base chemicals that go into these programs. We can help with product selection, grade matching, and sourcing from multiple origins for supply security.

Typical Treatment Workflow
1
System Assessment
Characterize operating conditions—fluid composition, temperature, pressure, flow rates—and benchmark current treatment performance.
2
Chemistry Selection
Match base chemicals to your operating envelope. Factor in compatibility with existing programs, regulatory constraints, and downstream impacts.
3
Dosage & Delivery
Determine optimal treat rates through jar testing or field trials. Configure packaging (drums, totes, ISO tanks) to match consumption and storage logistics.
4
Monitoring & Adjustment
Track KPIs—coupon rates, residuals, separator performance, water quality. Adjust chemistry and dosage as conditions change.
Recommended Chemistries (5)
Sulfuric Acid 93%
CAS 7664-93-9
Acids & Salts
Primary acid for pH reduction
1830 (SULFURIC ACID) · Class
Lowest-cost strong acid for neutralizing alkaline effluent to the discharge band; high neutralizing capacity per volume
Melting Point: 10 °C   Boiling Point: 290 °C at 760 mmHg   Density: 1.841
Full Details
Hydrochloric Acid
CAS 7647-01-0
Acids & Salts
pH Adjustment
1789 (HYDROCHLORIC ACID, SOLUTION) · Class
Strong acid where sulfate addition must be avoided (e.g., gypsum-scaling or sulfate-limited permits)
Melting Point: -115 °C (Melting point is -25 °C for a 39.17% w…   Boiling Point: 51 °C at 760 mmHg   Density: 1.05 at 15 °C for 10.17% weight/weight solution
Full Details
Caustic Soda (Sodium Hydroxide) Beads
CAS 1310-73-2
Acids & Salts
Primary alkali for pH raise
1824 (SODIUM HYDROXIDE SOLUTION) · Class
Fast, fully soluble alkali to raise acidic effluent into compliance without adding hardness
Melting Point: 318 °C   Boiling Point: > 130 °C at 760 mmHg   Density: 1.5 at 20 °C
Full Details
Sodium Carbonate (Soda Ash)
CAS 497-19-8
Acids & Salts
Moderate alkali and buffer
Soda ash gives buffered, less-aggressive pH lift than caustic, reducing overshoot on swinging streams
Melting Point: 856 °C   Boiling Point: Decomposes on heating by CO2 loss   Density: 2.54 g/cu cm
Full Details
Calcium Hydroxide (Pickling Lime)
CAS 1305-62-0
Specialty Additives
pH Adjustment
Lime is the low-cost bulk alkali for large acidic flows and simultaneously aids metals/sulfate precipitation
Melting Point: 580 °C (Decomposes) (Loses H2O)   Boiling Point: Decomposes   Density: 2.24 at 20 °C
Full Details

Need help selecting the right chemistry?

Our team can help with grade selection, dosage guidance, and multi-origin sourcing.

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